For advanced users, CalTopo offers a number of custom layers: MapBuilder, viewsheds, sunlight, scanned maps, DEM-based shading and third-party WMS and tile sources. A persistent issue with these layers is that they are tied to either the map you are working on, or the URL of a blank page. It’s easy to go wild customizing them, and then suddenly find yourself starting from scratch with a new map.

In a long overdue solution, you can now save custom layers to your account. Every custom layer dialog has a “Save To Account” link at the bottom which adds that layer to your account:

As with maps, these layers are listed on a tab on the account dialog:

And shown in a separate section of either the layer dropdown or the overlay list, depending on how the layer is configured: